Machine for cutting shank-stiffeners.



Nd. 740,169; PATENTBD 831 129; 1903.

w. 15. OBRIEN & D. KEITH. MACHINE FOR CUTTING SHARK STIFFENBRS.

APPLICATION 211.21 3011214902. M01131 2 sums-sum 1.

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ma npnms wcrznscny movmqmon ww-num'ou n c P H E K QM. R. & N E I R m U r W MACHINE FOR GUTTING SHANE STIFPENERS.

APPLICATION FILED 30V. 13. 1902.

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I UNIT D V STATES WILLIAM F. OBRIEN Patented September 29, 19036.

PATENT Oriucn.

MAC HINE FOR CUTTING SHA NK-STIFFENERS.

SPECIFICATION forming part of Letters Patent No. 740,169, dated September 29, 1903.

Application filed November 13, 1902. Serial No. 131,133.

(No model.)

To all whom it may concern.-

Be it known that we, XVILLIAM F. OBRIEN and DARIUS S. KEITH, of Whitman, county of Plymouth, State of lliassachusetts, have invented an Improvement in Machines for CuttingShank-Stiffeners, of which the follow ing description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts. p

This invention is intended as an improvement upon'the machine for cutting shankstiffeners shown and described in United States Patent No. 614,972, dated November 29, 1898.

When the machine shown in this patent is being operated to cut angle-toed shanks, the strip from which the shanks are cut is fed to the knives obliquely or in a diagonal direction. In practice angle-toed shanks are used as rights and lefts, and it has been customary to set up two machines substantially alike, one for cutting the rights and the other the lefts, the strips being fed obliquely to the knives of the two machines in diiierent directions. Many diiferent sizes and widths of shank-stifieners are sold; but the orders for.

each size and width are usually small, and on a set of, say, six machines only three sizes can be cut at a time. To change from one size to another, the knives of two machines must be changed, an operation which requires considerable time, and as a result the daily output of a machine is materially reduced, particularly when small orders for many different sizes are received. 1

This invention has for its object to improve the construction of the machine, to the end that it will have the capability of cutting angle-toed shanks, both rights and lefts, out changing the knives, and the slight changes which will'be required are of such a simple character that they can be accomplished in a few minutes, and the result is that the daily output of the machines is very materially increased.

In carrying out this invention a guide-support is provided which is adapted to receive two obliquely disposed edge guides for the strips being out which extend in difierent directions, and

one or the other will be emwithployed, as is requirethto guide the strips to the knives, and no change in the knives is necessary; also, the guide-support is adapted to receive and support two end-guides for the strips being cut, and one or the other will be employed as is required. The edge-guides and end-guides are adapted to be used in conjunction with a rotating bed, as such form of bed is employed in this machine; yet the invention is not thus limited.

Figure 1 shows in front elevation a machine for cutting shank-stiifeners embodying this invention. Fig. 2 is an enlarged sectional detail of the rotatable bed, guide-support, edge-guide, and end-guide, and means for moving the end-guide away from the bed. Fig. 3 is an enlarged detail of the bed and guides. 7 portion of the edge-guide, to be referred to.

The bed m, means for rotating it, the knifecarrier b, and knives borne by it are all substantially the same as in the patent referred to, although the knives may be of any suitable shape.

19 represents the guide support, which 1s made as a flat plate obliquely supported b/ suitable brackets p? which are secured to the frame, and said guidesupport is located as close to the bed m as possible. The guidesupport 13 is provided with holesqj adapting it to receive two edge-guides, either one or the other of which may be used. The edge-guides are made substantially alike, each consisting of a strip or bar 23 having laterally-project ing perforated arms go, through whichbolts pass, which bolts also pass through the holes 19 to secure the edge-guide to the guide-support, and said bar p has at its end a short bar 11 pivoted to it, and a fiat spring 19 is provided, which holds the pivoted end piece down on Fig. L is an enlarged detail of the end the bed m. Revolution of the bed is permitted ICO it becomes necessary to remove one of the edge guides and apply the other, the same machine being employed and no change in the knives required. As an end-guide for the strip being cut, a bar If is provided, and the guide-support p is provided with holes 6 for the application of two of these end-guides. The bar 25 projects beyond the edge of the guide-support and onto the bed m, and when said bed is in position to hold the strip properly for the correct action of the knives the bar will occupy a position in parallelism with the surface of the bed and bear upon it. One

or more studs t project from the under side of the bar 2f, which bear upon the bed and aid in firmly and correctly holding the end-guide in position. The extremity t of the bar t is turned 0r bent at substantially right angles to the main body of the bar and the end of the strip being cut is held pressed against the extremity i of the end-guide.

In order that the projecting end-guide will not obstruct rotary movement of the bed m, the forward extremity of the endguide is movable in a direction away from the bed, and to accomplish this result the forward extremity of the bar is made spring-acting or surficiently elastic to be raised or moved away from the bed, so as to enable the bed to turn' beneath it. To move the forward extremity of the bar t in a direction away from the bed, a finger #is secured to a rock-shaft 25 to which a long arm If is secured, which is adapted to be engaged and operated by an eccentric disk 27. The end-guides, one only of which will be employed at a time, are located at one side of the strip-receiving runway to the knives, and when angle-toed rights are being cut one of said end-guides will be employed, and when angle-toed lefts are being cut the other enclguide will be employed. The finger t is made adjustable 011 the rock-shaft i so as to be moved along on said shaft to a position to engage either one of the end-guides that may be employed. lVe do not, however, desire to limit our invention to the particular means herein shown for operating the end-guides to lift their ends free from the bed and permit rotary movement of the bed.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. In a machine for cutting shank-stiffeners, the combination with a rotatable bed of a guide-support and an edge -guide secured thereto having a pivoted end portion which overlaps the bed, substantially as described.

2. In a machine for cutting shank-stiffeners, the combination with a bed, of a guidesupport havingprovision for receiving two oblique edge-guides for the strip which extend in different directions, and edgeguides adapted to be secured thereto having pivoted end portions which overlap the bed, substantially as described.

3. In a machine for cutting shank-stiffeners, the combination with a rotatable bed, of a guide-support and endguides for the strip adapted to be secured thereto, which project into the path of movement of the bed and means for moving said end-guides away from the bed, substantially as described.

4. In a machine for cutting shank-stiffeners, the combination with a rotatable bed, of a guide-support, an end-guide for the strip secured thereto, which overlaps said bed, and means for moving said end-guide in a direction away from the bed, substantially as described.

5. In a machine for cutting shank-stiffeners, the combination with a bed, of a guide support having provision for receiving two end-guides for the strips, and two end-guides adapted to be secured to said guide-support which project into the path of movement of the bed, means for moving the end guides away from the bed consisting of a rock-shaft, means for rocking it, and a fingeradjustably secured to said shaft, substantially as described.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

IVILLIAM F. OBRIEN. DARIUS S. KEITH.

Vitnesses:

B. J. NoYns, H. B. DAVIS. 

